Dynamic balance correction mechanism for steam turbine rotor

Abstract

The invention provides a steam turbine rotor dynamic balance correction mechanism which comprises a supporting seat, a lifting frame, a supporting wheel and a cleaning mechanism. The lifting frame is fixedly connected to the upper end of the supporting seat; the number of the supporting wheels is two, the supporting wheels are rotationally connected to the lifting frame, the two supporting wheels are arranged side by side, the axial leads of the two supporting wheels are parallel to each other and are located on the same horizontal plane, and the steam turbine rotating shaft is rotationally supported above the two supporting wheels; the cleaning mechanism is arranged at the bottom of each supporting wheel so as to remove dust attached to the wheel faces of the supporting wheels. By arranging the cleaning mechanism, dust attached to the wheel face of the supporting wheel can be removed, and the dynamic balance correction precision is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of steam turbine technology, and in particular to a steam turbine rotor dynamic balancing correction mechanism. Background Technology

[0002] In recent years, with the rapid development of the power industry, the requirements for the operational stability and reliability of steam turbines, as core power equipment, have been increasing. As a key component of the steam turbine, the rotor, if unbalanced during high-speed rotation, can lead to increased equipment vibration, accelerated bearing wear, and even serious accidents. Therefore, rotor dynamic balancing has become a crucial step in manufacturing and maintenance. Currently, balancing is typically performed using a balancing machine, which calculates the mass and location of counterweights to be added or removed by measuring the unbalanced vibration signal during rotor rotation, thereby achieving balance correction.

[0003] Currently, before using a balancing machine to perform dynamic balancing tests on the rotor, a crucial preparatory step must be completed: thoroughly cleaning the support wheels inside the turbine support base on the balancing machine track. This cleaning process is essential because only by ensuring that the surface of the support wheels is spotless can dust and impurities prevent adverse effects on the test when they come into contact with and rotate with the rotor surface. If the support wheel surface is contaminated with dust or impurities, these tiny particles may alter the actual operating state of the rotor during the dynamic balancing test, thereby interfering with the accuracy of the test data and ultimately reducing the precision of the dynamic balancing correction. Summary of the Invention This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a turbine rotor dynamic balancing correction mechanism, which can clean the support wheels and ensure the accuracy of dynamic balancing correction.

[0004] This invention provides a turbine rotor dynamic balancing correction mechanism, including a support base, a lifting frame, support wheels, and a cleaning mechanism. The support base is located below the turbine shaft; the lifting frame is fixedly connected to the upper end of the support base; two support wheels are provided and rotatably connected to the lifting frame, with the two support wheels arranged side by side, their axes parallel to each other and on the same horizontal plane, and the turbine shaft rotatably supported above the two support wheels; the cleaning mechanism is located at the bottom of each support wheel to remove dust adhering to the wheel surface.

[0005] In some embodiments, the lifting frame includes a support beam, a hydraulic cylinder, and two adjusting frames. The support beam is slidably connected between the two adjusting frames. The cylinder body of the hydraulic cylinder is fixedly connected to the upper end of the support base. The cylinder rod of the hydraulic cylinder extends and retracts upward. The cylinder rod is fixedly connected to the bottom of the support beam and drives the support beam to move in the vertical direction. The support wheel is rotatably connected to the support beam and located between the two adjusting frames.

[0006] In some embodiments, the adjusting frame has a vertical adjusting hole, and the two sides of the support beam are slidably connected to the adjusting hole by adjusting screws. The adjusting screws pass through the adjusting hole in the horizontal direction. When the support beam slides to the designated position, the adjusting screws are locked onto the adjusting frame by nuts.

[0007] In some embodiments, one end of the adjusting screw is fixedly connected to a rotating handle.

[0008] In some embodiments, a wheel groove is provided above the support beam, and a support wheel is rotatably connected in the wheel groove. A cleaning groove is provided below the wheel groove, and a cleaning mechanism is disposed in the cleaning groove.

[0009] In some embodiments, a support block is fixedly connected between the top end of the cylinder rod and the support beam. The support block is disc-shaped and its outer diameter is larger than that of the cylinder rod.

[0010] In some embodiments, the cleaning mechanism includes a rubber scraper and a support. The support is detachably and fixedly connected to the bottom of the cleaning tank. A slot is provided on the top of the support. The rubber scraper is inserted into the slot and fixed in the slot in the horizontal direction by bolts and nuts. The top of the rubber scraper abuts against the wheel surface of the support wheel to remove dust adhering to the wheel surface of the support wheel during the rotation of the support wheel. The width of the rubber scraper is equal to the width of the wheel surface of the support wheel.

[0011] In some embodiments, the support is detachably fixed to the bottom of the cleaning tank by bolts.

[0012] In some embodiments, inclined surfaces are symmetrically arranged on both sides of the top of the rubber scraper.

[0013] In some embodiments, the turbine rotor dynamic balancing correction mechanism further includes a track, and a plurality of support seats are provided and slidably connected to the upper end of the track. Each support seat is connected to a set of lifting frames, support wheels and cleaning mechanisms. Attached Figure Description

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a schematic diagram of the turbine rotor dynamic balancing correction mechanism according to an embodiment of the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the diagram; Figure 3 for Figure 1 Rear view of the lifting frame; Figure 4 for Figure 3 A schematic diagram of the cleaning mechanism in the diagram; Figure label: 1. Drive mechanism; 2. Support base; 3. Track; 4. Support beam; 5. Support wheel; 6. Adjustment frame; 7. Rotary handle; 8. Adjustment screw; 9. Support block; 10. Hydraulic cylinder; 11. Adjustment hole; 12. Cleaning tank; 13. Cleaning mechanism; 131. Rubber scraper; 132. Support. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0016] The turbine rotor dynamic balancing correction mechanism of the present invention is described below with reference to the accompanying drawings.

[0017] like Figure 1-4 As shown in the figure, this embodiment of the invention proposes a turbine rotor dynamic balancing correction mechanism, including a support base 2, a lifting frame, support wheels 5, and a cleaning mechanism 13. The support base 2 is located below the turbine shaft; the lifting frame is fixedly connected to the upper end of the support base 2; two support wheels 5 are provided and rotatably connected to the lifting frame, the two support wheels 5 are arranged side by side, the axis lines of the two support wheels 5 are parallel to each other and on the same horizontal plane, and the turbine shaft is rotatably supported above the two support wheels 5; the cleaning mechanism 13 is located at the bottom of each support wheel 5 to remove dust adhering to the wheel surface of the support wheel 5.

[0018] In this embodiment of the invention, a cleaning mechanism 13 is provided to remove dust adhering to the surface of the support wheel 5, ensuring the accuracy of dynamic balance correction. A lifting frame is provided to adjust the vertical position of the support wheel 5 to align it with the turbine shaft.

[0019] It should be noted that the turbine shaft is driven to rotate by drive mechanism 1.

[0020] In some embodiments, such as Figure 2 , 3 As shown, the lifting frame includes a support beam 4, a hydraulic cylinder 10, and two adjusting frames 6. The support beam 4 is slidably connected between the two adjusting frames 6. The cylinder body of the hydraulic cylinder 10 is fixedly connected to the upper end of the support base 2. The cylinder rod of the hydraulic cylinder 10 extends and retracts upward. The cylinder rod is fixedly connected to the bottom of the support beam 4 and drives the support beam 4 to move in the vertical direction. The support wheel 5 is rotatably connected to the support beam 4 and is located between the two adjusting frames 6.

[0021] In some embodiments, such as Figure 2 , 3As shown, the adjustment frame 6 has a vertical adjustment hole 11. The two sides of the support beam 4 are slidably connected to the adjustment hole by the adjustment screw 8. The adjustment screw 8 passes through the adjustment hole 11 in the horizontal direction. When the support beam 4 slides to the designated position, the adjustment screw 8 is locked on the adjustment frame 6 with a nut.

[0022] By using the adjusting screw 8, the support beam 4 can slide vertically, and the nut can be used to provide auxiliary support for the support beam 4.

[0023] In some embodiments, such as Figure 2 As shown, one end of the adjusting screw 8 is fixedly connected to the rotating handle 7. This facilitates tightening the adjusting screw 8.

[0024] In some embodiments, such as Figure 3 As shown, a wheel groove is provided above the support beam 4, and the support wheel 5 is rotatably connected in the wheel groove. A cleaning groove 12 is provided below the wheel groove, and the cleaning mechanism 13 is located in the cleaning groove 12.

[0025] In some embodiments, such as Figure 3 As shown, a support block 9 is fixedly connected between the top of the cylinder rod and the support beam 4. The support block 9 is disc-shaped, and its outer diameter is larger than that of the cylinder rod. This increases the area of ​​the bearing surface and improves the support effect.

[0026] In some embodiments, such as Figure 4 As shown, the cleaning mechanism 13 includes a rubber scraper 131 and a support 132. The support 132 is detachably and fixedly connected to the bottom of the cleaning tank 12. A slot is provided on the top of the support 132. The rubber scraper 131 is inserted into the slot and fixed in the slot in the horizontal direction by bolts and nuts. The top of the rubber scraper 131 abuts against the wheel surface of the support wheel 5 to remove the dust attached to the wheel surface of the support wheel 5 during the rotation of the support wheel 5. The width of the rubber scraper 131 is equal to the width of the wheel surface of the support wheel 5.

[0027] In some embodiments, the support 132 is detachably fixed to the bottom of the cleaning tank 12 by bolts.

[0028] In some embodiments, such as Figure 4 As shown, the top of the rubber scraper 131 has symmetrically arranged inclined surfaces on both sides. Regardless of whether the support wheel 5 rotates clockwise or counterclockwise, the surface of the support wheel 5 can be effectively cleaned.

[0029] In some embodiments, such as Figure 1As shown, the turbine rotor dynamic balancing correction mechanism also includes a track 3, and several support seats 2 are provided and slidably connected to the upper end of the track 3. Each support seat 2 is connected to a set of lifting frames, support wheels 5 and cleaning mechanism 13. The position of the support seats 2 can be adjusted according to actual needs. If the shaft is long, multiple support seats 2 can be set to support the shaft.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dynamic balancing correction mechanism for a steam turbine rotor, characterized in that, include: A support base, wherein the support base is located below the turbine shaft; A lifting frame, which is fixedly connected to the upper end of the support base; The support wheels are provided in two and rotatably connected to the lifting frame. The two support wheels are arranged side by side, and the axis lines of the two support wheels are parallel to each other and on the same horizontal plane. The turbine shaft is rotatably supported above the two support wheels. A cleaning mechanism is provided at the bottom of each of the support wheels to remove dust adhering to the wheel surface.

2. The turbine rotor dynamic balancing correction mechanism according to claim 1, characterized in that, The lifting frame includes a support beam, a hydraulic cylinder, and two adjusting frames. The support beam is slidably connected between the two adjusting frames. The cylinder body of the hydraulic cylinder is fixedly connected to the upper end of the support base. The cylinder rod of the hydraulic cylinder extends and retracts upward. The cylinder rod is fixedly connected to the bottom of the support beam and drives the support beam to move in the vertical direction. The support wheel is rotatably connected to the support beam and located between the two adjusting frames.

3. The turbine rotor dynamic balancing correction mechanism according to claim 2, characterized in that, The adjustment frame has a vertical adjustment hole. The two sides of the support beam are slidably connected to the adjustment hole by an adjustment screw. The adjustment screw passes through the adjustment hole in the horizontal direction. When the support beam slides to the designated position, the adjustment screw is locked onto the adjustment frame with a nut.

4. The turbine rotor dynamic balancing correction mechanism according to claim 3, characterized in that, One end of the adjusting screw is fixedly connected to a rotating handle.

5. The turbine rotor dynamic balancing correction mechanism according to claim 3, characterized in that, A wheel groove is provided above the support beam, and the support wheel is rotatably connected to the wheel groove. A cleaning groove is provided below the wheel groove, and the cleaning mechanism is located in the cleaning groove.

6. The turbine rotor dynamic balancing correction mechanism according to claim 2, characterized in that, A support block is fixedly connected between the top end of the cylinder rod and the support beam. The support block is disc-shaped and its outer diameter is larger than that of the cylinder rod.

7. The turbine rotor dynamic balancing correction mechanism according to claim 1, characterized in that, The cleaning mechanism includes a rubber scraper and a support. The support is detachably and fixedly connected to the bottom of the cleaning tank. A slot is provided on the top of the support. The rubber scraper is inserted into the slot and fixed in the slot in the horizontal direction by bolts and nuts. The top of the rubber scraper abuts against the wheel surface of the support wheel to remove dust adhering to the wheel surface of the support wheel during the rotation of the support wheel. The width of the rubber scraper is equal to the width of the wheel surface of the support wheel.

8. The turbine rotor dynamic balancing correction mechanism according to claim 7, characterized in that, The support is detachably and fixedly connected to the bottom of the cleaning tank by bolts.

9. The turbine rotor dynamic balancing correction mechanism according to claim 7, characterized in that, The top of the rubber scraper has symmetrically arranged inclined surfaces on both sides.

10. The turbine rotor dynamic balancing correction mechanism according to claim 1, characterized in that, It also includes a track, and the support base is provided in several parts and slidably connected to the upper end of the track. Each support base is respectively connected to a set of the lifting frame, the support wheel and the cleaning mechanism.

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